Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2009-04-22
Nucl.Phys.Proc.Suppl.190:144-149,2009
Physics
High Energy Physics
High Energy Physics - Phenomenology
6 pages, 6 figures. Proceedings of CRIS 2008 - Cosmic Ray International Seminar, Malfa Island, Italy, September 15-19, 2008
Scientific paper
10.1016/j.nuclphysbps.2009.03.08
The detection of Earth-skimming tau neutrinos has turned into a very promising strategy for the observation of UHE cosmic neutrinos. The sensitivity of this channel crucially depends on the parameters of the propagation of the tau neutrino (and the tau lepton) through the terrestrial crust, which governs the flux of emerging tau leptons that can be detected. This propagation problem is usually treated in a simplified framework where several effects are neglected, e.g. the possibility of multiple regenerations of the tau neutrino, the weak interactions of the tau lepton, as well as the stochastic nature of its energy losses. We discuss here the validity of such approximations by studying the propagation in standard rock of tau leptons and neutrinos with both mono-energetic and power-law spectra. We also investigate the impact of such simplifications in non-standard scenarios for the neutrino-nucleon interactions as well as for the tau energy losses.
Blanch Bigas Oscar
Deligny Olivier
Payet Kévin
Van Elewyck Veronique
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